Manual-hydraulic flat valve with hydraulic oil way monitoring function

Abstract

The invention discloses a manual-hydraulic flat valve with a hydraulic oil way monitoring function, and relates to the technical field of valves, the manual-hydraulic flat valve comprises a valve body, valve seats, a gate plate and a valve rod, the valve seats and the gate plate are arranged in the valve body, the valve seats are located on the two sides of the gate plate and connected with the valve body through wave springs, one end of the valve rod is connected with the gate plate, and the other end of the valve rod is connected with the gate plate. The hydraulic control valve is characterized in that the other end of the valve rod penetrates through a valve cover on the valve body and is connected with a driving device, the driving device is arranged on the valve cover through a support, the driving device is connected with hydraulic equipment, and a monitoring module is arranged in the driving device and used for monitoring hydraulic pressure in the driving device. The monitoring module can monitor the hydraulic pressure in the driving device; according to the flat valve, the oil way can be effectively monitored by arranging the monitoring module, so that the reliability of the flat valve is improved, and the situation that manual operation cannot be carried out in an emergency (caused by oil way blockage) is avoided.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a hand-operated hydraulic flat plate valve with hydraulic circuit monitoring function. Background Technology

[0002] Traditional flat panel valves mainly have three switching methods: manual, hydraulic, and pneumatic. Manual switching has disadvantages such as susceptibility to torque factors and slow switching action, while hydraulic or pneumatic switching offers advantages such as low latency, fast switching speed, and remote control capability. However, problems with hydraulic or pneumatic pressure may prevent the valve from opening or closing, potentially leading to safety accidents.

[0003] To address the shortcomings of a single on / off method, existing technologies typically employ a dual manual and automatic control design, such as a flat plate valve that can be manually and hydraulically driven. This combines the advantages of both manual and hydraulic actuation, avoiding their respective disadvantages and improving safety. While this design alleviates some of the deficiencies of traditional flat plate valves, several problems remain. For example, in a manually and hydraulically driven flat plate valve, the embedded circulating oil pipe is prone to clogging, and the lack of effective monitoring devices makes it difficult to detect blockages or leaks in the internal circulating oil pipe, posing a risk to manual operation in emergencies. Therefore, how to monitor the hydraulic circuit to improve the reliability of the flat plate valve is the technical problem this application aims to solve. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a hand-operated hydraulic flat valve with hydraulic circuit monitoring function, comprising: a valve body, a valve seat, a gate, and a valve stem. The valve seat and the gate are both disposed within the valve body. The valve seat is located on both sides of the gate and is connected to the valve body via wave springs. One end of the valve stem is connected to the gate, and the other end of the valve stem passes through a valve cover on the valve body and is connected to a drive device. The drive device is mounted on the valve cover via a bracket and is connected to a hydraulic device. A monitoring module is disposed within the drive device for monitoring the hydraulic pressure within the drive device.

[0006] Preferably, it also includes a mode switching device for providing both automatic and manual modes for the movement of the valve stem; When in automatic mode, the mode switching device controls the movement of the valve stem via hydraulic control. When in manual mode, the mode switching device allows for manual control of the valve stem movement; When the monitoring module detects a hydraulic leak, the mode switching device switches from automatic mode to manual mode and locks.

[0007] Preferably, the mode switching device consists of a housing, a first transmission device, a second transmission device, a switching device, and a handwheel. The first transmission device is disposed inside the housing. The end of the valve stem away from the gate passes through the housing and the first transmission device and is movably connected to the first transmission device. The first transmission device has a degree of freedom in the axial direction of the valve stem. The second transmission device is disposed on the housing through the switching device. The handwheel is disposed at one end of the second transmission device. When using automatic mode, there is a gap between the second transmission device and the first transmission device; When switching from automatic mode to manual mode, the switching device controls the second transmission device to move in the direction of the first transmission device; When using manual mode, the second transmission device is connected to the first transmission device.

[0008] Preferably, the first transmission device is a gear, and a snap-fit ​​hole is provided at the center of the first transmission device. The valve stem has a snap-fit ​​section that is adapted to the shape of the snap-fit ​​hole. The snap-fit ​​section is located at the end of the valve stem away from the gate plate, and the snap-fit ​​section passes through the outer shell and the first transmission device.

[0009] Preferably, the outer wall of the second transmission device is provided with external threads, one end of the second transmission device is located inside the housing and connected to the switching device, the other end passes through the switching device and extends to the outside of the housing, and the handwheel is connected to the end of the second transmission device located outside the housing; When using automatic mode, there is a gap between the second transmission device and the first transmission device; When using manual mode, the second transmission device engages with the first transmission device.

[0010] Preferably, the switching device consists of a first shaft and a second shaft, which are mounted on two opposite sidewalls of the housing. The first shaft has a first hole, and the second shaft has a second hole. The central axis of the first shaft coincides with the central axis of the second shaft, and the central axis of the first hole coincides with the central axis of the second hole. The central axis of the first shaft is parallel to but does not coincide with the central axis of the first hole. One end of the second transmission device is located in the second hole, and the other end passes through the first hole. The external thread of the second transmission device is located between the first shaft and the second shaft. The central axis of the first shaft is the rotation axis of the switching device.

[0011] Preferably, the switching device is provided with a locking device. When the automatic mode is used, or when switching from the automatic mode to the manual mode, the locking device is connected to the second transmission device to prevent the second transmission device from rotating.

[0012] Preferably, the switching device further includes a handle, one end of which is connected to the first shaft and the other end of which is connected to the second shaft. The handle is used to realize the synchronous rotation of the first shaft and the second shaft.

[0013] Preferably, the portion of the second shaft located within the adaptive device is a tubular structure with openings in its sidewalls, and the openings of the tubular structure form a first abutment surface and a second abutment surface.

[0014] Preferably, the mode conversion device further includes an adaptive device, which is sleeved on the second shaft and located outside the housing. The adaptive device consists of a sleeve, a mandrel, and a connecting plate. The outer diameter of the mandrel is adapted to the inner diameter of the tubular structure. The mandrel is located inside the sleeve. The outer wall of the mandrel is connected to the inner wall of the sleeve through the connecting plate. The connecting plate has a third abutment surface opposite to the first abutment surface and a fourth abutment surface opposite to the second abutment surface. A first injection space is formed between the first abutment surface and the third abutment surface, and a second injection space is formed between the second abutment surface and the fourth abutment surface. The sleeve is sleeved outside the tubular structure. The sleeve is provided with a first injection port, a second injection port, and a pressure relief port. The first injection port communicates with the first injection space, and the second injection port communicates with the second injection space. When using manual mode, the pressure relief port is connected to the second injection space.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The monitoring module can monitor the hydraulic pressure within the drive unit. When a decrease in hydraulic oil pressure is detected, the hydraulic equipment adjusts the pressure of the drive unit. If the hydraulic oil pressure continues to drop, an alarm is triggered to indicate a hydraulic oil leak. During the switch from automatic to manual mode, if the monitoring module does not detect a change in hydraulic oil pressure, it determines that the oil circuit is blocked and triggers an alarm. By setting up the monitoring module, the oil circuit can be effectively monitored, thereby improving the reliability of the flat valve and preventing situations where manual operation is impossible (due to oil circuit blockage) in sudden circumstances.

[0016] The hand-operated hydraulic flat valve with hydraulic circuit monitoring function described in this invention, other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the hand-operated hydraulic flat valve with hydraulic circuit monitoring function described in this invention.

[0018] Figure 2 This is a schematic diagram of the hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to the present invention (drive device not shown).

[0019] Figure 3 This is the front view of the mode conversion device.

[0020] Figure 4 This is a schematic diagram of a mode conversion device.

[0021] Figure 5 This is a schematic diagram showing a gap between the first and second transmission devices in automatic mode.

[0022] Figure 6 This is a schematic diagram showing the engagement of the first and second transmission devices in manual mode.

[0023] Figure 7 This is a schematic diagram showing the four contact surfaces on the tubular structure and the adaptive device.

[0024] Figure 8 This is a cross-sectional view of the adaptive device.

[0025] In the diagram: 1 Valve body, 2 Valve seat, 3 Gate, 4 Valve stem, 41 Snap-fit ​​section, 5 Valve cover, 6 Drive device, 7 Mode conversion device, 71 Housing, 72 First transmission device, 73 Second transmission device, 74 Handwheel, 8 Switching device, 81 First shaft, 82 Second shaft, 821 Tubular structure, 8211 First contact surface, 8212 Second contact surface, 8213 Third contact surface, 8214 Fourth contact surface, 83 Handle, 9 Locking device, 10 Adaptive device, 101 Sleeve, 102 Core rod, 103 Connecting plate, 111 First connecting end, 112 Second connecting end, 113 Pressure relief valve. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0027] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0028] like Figures 1-8As shown, this invention provides a hand-operated hydraulic flat valve with hydraulic circuit monitoring function, comprising: a valve body 1, a valve seat 2, a gate 3, and a valve stem 4. The valve seat 2 and the gate 3 are both disposed within the valve body 1. The valve seat 2 is located on both sides of the gate 3 and is connected to the valve body 1 via wave springs. One end of the valve stem 4 is connected to the gate 3, and the other end of the valve stem 4 passes through a valve cover 5 on the valve body 1 and is connected to a drive device 6. The valve body 1, valve seat 2, gate 3, valve stem 4, valve cover 5, and drive device 6 are all commercially available products or existing technologies, such as patent application number CN202122506854.5. According to the disclosed information, the drive device 6 is mounted on the valve cover 5 via a bracket. The drive device 6 is connected to a hydraulic device, which is a commercially available product or existing technology. The hydraulic device can provide hydraulic oil to the drive device 6, thereby driving the valve stem 4 to move and controlling the opening and closing of the gate 3. This allows the flat valve to have two control modes: an automatic mode controlled by the drive device 6 and a manual mode operated manually. The drive device 6 is equipped with a monitoring module, which is used to monitor the hydraulic pressure (pressure of hydraulic oil) within the drive device 6. The monitoring module can monitor the hydraulic pressure within the drive device 6. When a decrease in hydraulic oil pressure is detected, the pressure of drive unit 6 is adjusted through hydraulic equipment. When the hydraulic oil pressure is detected to be continuously decreasing, an alarm will be triggered to indicate a hydraulic oil leak. If the monitoring module does not detect any change in hydraulic oil pressure during the switch from automatic to manual mode, it will determine that the oil circuit is blocked and issue an alarm.

[0029] By setting up a monitoring module, the oil circuit can be effectively monitored, thereby improving the reliability of the flat valve and avoiding situations where manual operation is impossible (due to oil circuit blockage) in case of emergencies.

[0030] Unlike electric flat valves (which typically have a motor mounted on the handwheel to rotate it), hydraulic or pneumatic flat valves have the valve stem's point of action located inside the drive unit 6, as described in patent application number CN202122506854.5. Therefore, if hydraulic oil leaks, the drive unit 6 can no longer provide the positioning force for the gate 3 (for example, when the flat valve is closed, the drive unit 6 provides a downward force to the gate 3; when the flat valve is open, the drive unit 6 provides a force to prevent the gate from falling). This can cause the gate 3 to fall or bounce under external forces such as water hammer, leading to either a lack of flow (the gate 3 falls, causing the flat valve to close) or leakage (the gate 3 bounces). If the hydraulic oil circuit is blocked, the hydraulic oil may not be able to return, ultimately making it impossible or very difficult to control the opening and closing of the gate 3 in manual mode.

[0031] Furthermore, it also includes a mode switching device 7 for providing both automatic and manual modes for the movement of the valve stem 4; When in automatic mode, the mode switching device 7 controls the movement of the valve stem 4 via hydraulic control; When using manual mode, the mode switching device 7 controls the movement of the valve stem 4 manually; When the monitoring module detects a hydraulic leak, it will sound an alarm, and the mode switching device 7 can switch from automatic mode to manual mode and lock.

[0032] Furthermore, since the information fed back by the monitoring module requires a separate receiving device, such as a sound and light control device to emit light and sound when an alarm is triggered, or to display it on a screen, if no relevant receiving device is set up, it cannot be presented intuitively on the flat plate valve. In order to make the "abnormal" phenomenon intuitively presented on the flat plate valve, while minimizing the impact on the size of the flat plate valve, we optimized the mode conversion device 7.

[0033] In this embodiment, the mode switching device 7 consists of a housing 71, a first transmission device 72, a second transmission device 73, a switching device 8, and a handwheel 74. The first transmission device 72 is disposed inside the housing 71. The end of the valve stem 4 away from the gate 3 passes through the housing 71 and the first transmission device 72 and is movably connected to the first transmission device 72. The first transmission device 72 has a degree of freedom in the axial direction of the valve stem 4, so that the valve stem 4 can move relative to the first transmission device 72 in the vertical direction, thereby avoiding affecting the opening and closing of the gate 3. The second transmission device 73 is disposed on the housing 71 through the switching device 8, and the handwheel 74 is disposed at one end of the second transmission device 73. When using automatic mode, there is a gap between the second transmission device 73 and the first transmission device 72, such as... Figure 5 As shown; When switching from automatic mode to manual mode, the switching device 8 controls the second transmission device 73 to move in the direction of the first transmission device 72; When using manual mode, the second transmission device 73 is connected to the first transmission device 72. In manual mode, the second transmission device 73 is driven to rotate by turning the handwheel 74. The second transmission device 73 drives the first transmission device 72 to rotate. The first transmission device 72 drives the valve stem 4 to rotate. When the valve stem 4 rotates, it will generate displacement in the vertical direction relative to the first transmission device 72, thereby controlling the opening and closing of the gate 3.

[0034] As one of many implementations, the first transmission device 72 is a gear, and a snap-fit ​​hole is provided at the center of the first transmission device 72. The valve stem 4 has a snap-fit ​​section 41 that is adapted to the shape of the snap-fit ​​hole. The snap-fit ​​section 41 is located at the end of the valve stem 4 away from the gate plate 3. The snap-fit ​​section 41 passes through the outer shell 71 and the first transmission device 72. Through the cooperation between the snap-fit ​​section 41 and the snap-fit ​​hole, the valve stem 4 can move vertically relative to the first transmission device 72, and when the first transmission device 72 rotates, it can drive the valve stem 4 to rotate.

[0035] As one of many implementations, the outer wall of the second transmission device 73 is provided with external threads. For example, the second transmission device 73 can be a screw. One end of the second transmission device 73 is located inside the housing 71 and connected to the switching device 8. The other end passes through the switching device 8 and extends to the outside of the housing 71. The second transmission device 73 and the switching device 8 are movably connected. The switching device 8 is used to change the position of the second transmission device 73 when switching between automatic mode and manual mode. The handwheel 74 is connected to the end of the second transmission device 73 located outside the housing 71, so that the second transmission device 73 can rotate about the central axis. When using automatic mode, the switching device 8 will place the second transmission device 73 away from the first transmission device 72, thereby creating a gap between the second transmission device 73 and the first transmission device 72, preventing the second transmission device 73 from driving the first transmission device 72 to rotate due to accidental touch of the handwheel 74. When using manual mode, the switching device 8 will position the second transmission device 73 in a position connected to the first transmission device 72. The second transmission device 73 engages with the first transmission device 72. When opening or closing the gate 3, only the handwheel 74 needs to be turned. The handwheel 74 will drive the second transmission device 73 to rotate, and the second transmission device 73 will drive the first transmission device 72 to rotate. The first transmission device 72 drives the valve stem 4 to rotate through the snap-fit ​​hole. During the rotation of the valve stem 4, it can move vertically relative to the first transmission device 72, thereby realizing the manual opening and closing of the gate 3.

[0036] Furthermore, the switching device 8 consists of a first shaft 81 and a second shaft 82. The first shaft 81 and the second shaft 82 are mounted on two opposite side walls of the housing 71. The first shaft 81 has a first hole, and the second shaft 82 has a second hole. The central axis of the first shaft 81 coincides with the central axis of the second shaft 82, and the central axis of the first hole coincides with the central axis of the second hole. The central axis of the first shaft 81 is parallel to but does not coincide with the central axis of the first hole. The central axis of the first shaft 81 is the rotation axis of the switching device 8. One end of the second transmission device 73 is located in the second hole, and the other end passes through the first hole and is connected to the handwheel 74. This ensures that the rotation axis of the switching device 8 does not coincide with the rotation axis of the second transmission device 73, thus causing the second transmission device 73 to be eccentrically mounted on the switching device 8. Therefore, when the switching device 8 rotates, it can drive the second transmission device 73 to revolve, thereby adjusting the position of the second transmission device 73. The external thread of the second transmission device 73 is located between the first shaft 81 and the second shaft 82.

[0037] Furthermore, the switching device 8 is provided with a locking device 9, which can be a screw or any commercially available product or existing technology capable of preventing the second transmission device 73 from rotating. When using automatic mode, or when switching from automatic mode to manual mode, the locking device 9 is connected to the second transmission device 73 to prevent the second transmission device 73 from rotating.

[0038] Furthermore, the switching device 8 also includes a handle 83, one end of which is connected to the first shaft 81 and the other end is connected to the second shaft 82. The handle 83 is used to realize the synchronous rotation of the first shaft 81 and the second shaft 82. At the same time, the handle 83 is in different positions in automatic mode and manual mode, which can effectively provide prompts to on-site personnel.

[0039] Furthermore, as mentioned in the aforementioned embodiments, abnormal conditions in the hydraulic circuit, besides hydraulic oil leakage, also include hydraulic oil circuit blockage, which affects the manual mode in case of emergencies (because part of the structure of the drive device 6 is usually located on the valve stem 4, as described in the patent application number CN202122506854.5, so when the hydraulic circuit is blocked, the hydraulic oil cannot flow back, and once an emergency occurs and the gate 3 is opened or closed in manual mode, the hydraulic oil in the drive device 6 will cause obstruction). Moreover, the monitoring module cannot intuitively reflect abnormal conditions on the flat valve. Although the addition of the handle 83 can indicate the position of the second transmission device 73 and the current usage mode (because the position of the second transmission device 73 is different in automatic and manual modes, the position of the handle 83 is also different in different modes), it still cannot provide intuitive feedback on abnormalities or solve the impact of oil circuit blockage on the manual mode. Therefore, we further optimized the mode switching device 7.

[0040] In this embodiment, the portion of the second shaft 82 located within the adaptive device 10 is a tubular structure 821 with openings in its sidewalls, such that the cross-section of the tubular structure 821 is C-shaped, as shown below. Figure 8 As shown, the two opposite end faces of the opening of the tubular structure 821 form a first abutting surface 8211 and a second abutting surface 8212.

[0041] The mode conversion device 7 also includes an adaptive device 10, which is sleeved on the second shaft 82 and located outside the housing 71. As one of many embodiments, the adaptive device 10 consists of a sleeve 101, a mandrel 102, and a connecting plate 103. The outer diameter of the mandrel 102 is adapted to the inner diameter of the tubular structure 821, so that the tubular structure 821 of the second shaft 82 can be fastened on the mandrel 102, reducing the impact of the tubular structure 821 on the overall rigidity and service life of the second shaft 82. For ease of installation, the distance between the first abutment surface 8211 and the second abutment surface 8212 is not less than the diameter of the mandrel, or the tubular structure 821 should at least have a certain degree of elasticity and deformation recovery capability.

[0042] The mandrel 102 is located inside the sleeve 101. The outer wall of the mandrel 102 is connected to the inner wall of the sleeve 101 via a connecting plate 103. The connecting plate 103 has a third abutment surface 8213 opposite to the first abutment surface 8211 and a fourth abutment surface 8214 opposite to the second abutment surface 8212. Figure 7As shown, a first injection space is formed between the first abutment surface 8211 and the third abutment surface 8213, and a second injection space is formed between the second abutment surface 8212 and the fourth abutment surface 8214. The sleeve 101 is sleeved on the outside of the tubular structure 821. The sleeve 101 is provided with a first injection port, a second injection port, and a pressure relief port. The first injection port is connected to the first injection space, and the second injection port is connected to the second injection space. A first connecting end 111 is provided in the first injection port, and a second connecting end 112 is provided in the second injection port. A pressure relief valve 113 is provided in the pressure relief port. The first injection port is connected to the driving device 6 through the first connecting end 111. When the hydraulic equipment injects hydraulic oil into the driving device 6, the hydraulic oil can be input from the driving device 6 to the first injection space through the first connecting end 111, and push the first abutment surface 8211 to move, thereby increasing the first injection space and compressing the second injection space.

[0043] Preferably, the second injection port is connected to the hydraulic equipment via the second connection end 112, and the hydraulic oil in the second injection space flows back to the hydraulic equipment through the hydraulic oil circuit. The drive device 6 is always connected to the first injection space. When the hydraulic equipment injects hydraulic oil into the drive device 6 to increase the pressure, the hydraulic pressure in the first injection space also increases, thereby keeping the handle 83 in the automatic mode position. When switched to manual mode, the drive unit 6 is under normal pressure. As the handle 83 is pulled, the first injection space is compressed, and the hydraulic oil in the first injection space flows back to the drive unit 6 and then back to the hydraulic equipment. As the second shaft 82 rotates, the second injection space gradually increases, and the pressure relief port is connected to the second injection space. It should be noted that when the first injection space is compressed to its limit, the first injection port is still connected to the first injection space, and when the second injection space is compressed to its limit, the second injection port is still connected to the second injection space. The pressure relief port is located at the position just blocked by the tubular structure 821.

[0044] When a hydraulic circuit leaks, as the hydraulic oil continues to decrease, the pressure inside the drive unit 6 gradually decreases. Under the weight of the handle 83 and the pressure of the second injection space, the hydraulic oil in the first injection space is also gradually forced into the drive unit 6, which causes the second shaft 82 to rotate and the position of the handle 83 to change. This allows on-site personnel to intuitively check the hydraulic circuit.

[0045] When the handle 83 is in manual mode, the locking device 9 can effectively prevent the handwheel 74 from rotating, thereby preventing the valve stem 4 from rotating and thus "locking" the position of the gate 3.

[0046] When the oil passage between the drive unit 6 and the hydraulic equipment is blocked, the first connection end 111 can be directly disconnected from the first inlet so that the hydraulic oil of the drive unit 6 can be discharged. When the oil passage between the second connecting end 112 and the hydraulic equipment is blocked, the second connecting end 112 can be directly removed from the second injection port. Alternatively, different methods can be used depending on the location of the handle 83: When handle 83 is in the manual mode position, that is, when you need to switch from manual mode to automatic mode, you can directly open the pressure relief valve 113 and then pull handle 83. When handle 83 is in the automatic mode position, i.e., when it is necessary to switch from automatic mode to manual mode, the second connection end 112 can be directly disconnected; or the pressure relief valve 113 can be opened and the handle 83 can be pressed down slightly to connect the pressure relief port with the second pressure injection space, allowing air to enter the second pressure injection space.

[0047] By setting a first injection pressure space and a second injection pressure space, changes in hydraulic oil pressure can be visually reflected by the position of handle 83.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A hand-operated hydraulic flat valve with hydraulic circuit monitoring function, comprising: The valve body (1), valve seat (2), gate (3) and valve stem (4) are provided. The valve seat (2) and gate (3) are both located inside the valve body (1). The valve seat (2) is located on both sides of the gate (3) and is connected to the valve body (1) by a wave spring. One end of the valve stem (4) is connected to the gate (3). The valve stem (4) is characterized in that the other end of the valve stem (4) passes through the valve cover (5) on the valve body (1) and is connected to the drive device (6). The drive device (6) is mounted on the valve cover (5) by a bracket. The drive device (6) is connected to a hydraulic device. A monitoring module is provided inside the drive device (6). The monitoring module is used to monitor the hydraulic pressure inside the drive device (6).

2. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 1, characterized in that, It also includes a mode switching device (7) for providing both automatic and manual modes for the movement of the valve stem (4); When in automatic mode, the mode switching device (7) controls the movement of the valve stem (4) via hydraulic control; When using manual mode, the mode switching device (7) moves the valve stem (4) manually; When the monitoring module detects a hydraulic leak, the mode switching device (7) switches from automatic mode to manual mode and locks.

3. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 2, characterized in that, The mode switching device (7) consists of a housing (71), a first transmission device (72), a second transmission device (73), a switching device (8), and a handwheel (74). The first transmission device (72) is located inside the housing (71). The end of the valve stem (4) away from the gate (3) passes through the housing (71) and the first transmission device (72) and is movably connected to the first transmission device (72). The first transmission device (72) has a degree of freedom in the axial direction of the valve stem (4). The second transmission device (73) is located on the housing (71) through the switching device (8). The handwheel (74) is located at one end of the second transmission device (73). When the automatic mode is used, there is a gap between the second transmission device (73) and the first transmission device (72); When switching from automatic mode to manual mode, the switching device (8) controls the second transmission device (73) to move in the direction of the first transmission device (72); When using manual mode, the second transmission device (73) is connected to the first transmission device (72).

4. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 3, characterized in that, The first transmission device (72) is a gear. A snap-fit ​​hole is provided at the center of the first transmission device (72). The valve stem (4) has a snap-fit ​​section (41) that is adapted to the shape of the snap-fit ​​hole. The snap-fit ​​section (41) is located at the end of the valve stem (4) away from the gate (3). The snap-fit ​​section (41) passes through the outer shell (71) and the first transmission device (72).

5. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 4, characterized in that, The outer wall of the second transmission device (73) is provided with external threads. One end of the second transmission device (73) is located inside the housing (71) and connected to the switching device (8). The other end passes through the switching device (8) and extends to the outside of the housing (71). The handwheel (74) is connected to the end of the second transmission device (73) located outside the housing (71). When the automatic mode is used, there is a gap between the second transmission device (73) and the first transmission device (72); When using manual mode, the second transmission device (73) engages with the first transmission device (72).

6. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 5, characterized in that, The switching device (8) consists of a first shaft (81) and a second shaft (82). The first shaft (81) and the second shaft (82) are mounted on two opposite side walls of the outer casing (71). The first shaft (81) has a first hole, and the second shaft (82) has a second hole. The central axis of the first shaft (81) coincides with the central axis of the second shaft (82). The central axis of the first hole coincides with the central axis of the second hole. The central axis of the first shaft (81) is parallel to and does not coincide with the central axis of the first hole. One end of the second transmission device (73) is located in the second hole, and the other end passes through the first hole. The external thread of the second transmission device (73) is located between the first shaft (81) and the second shaft (82). The central axis of the first shaft (81) is the rotation axis of the switching device (8).

7. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 6, characterized in that, The switching device (8) is provided with a locking device (9). When the automatic mode is used, or when switching from the automatic mode to the manual mode, the locking device (9) is connected to the second transmission device (73) to prevent the second transmission device (73) from rotating.

8. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 6, characterized in that, The switching device (8) also includes a handle (83), one end of which is connected to the first shaft (81) and the other end is connected to the second shaft (82). The handle (83) is used to realize the synchronous rotation of the first shaft (81) and the second shaft (82).

9. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 6, characterized in that, The portion of the second shaft (82) located within the adaptive device (10) is a tubular structure (821) with an opening in the sidewall, and a first contact surface (8211) and a second contact surface (8212) are formed at the opening of the tubular structure (821).

10. The hand-operated hydraulic flat valve with hydraulic circuit monitoring function according to claim 9, characterized in that, The mode conversion device (7) further includes an adaptive device (10), which is sleeved on the second shaft (82) and located outside the outer casing (71). The adaptive device (10) consists of a sleeve (101), a mandrel (102), and a connecting plate (103). The outer diameter of the mandrel (102) is adapted to the inner diameter of the tubular structure (821). The mandrel (102) is located inside the sleeve (101). The outer wall of the mandrel (102) is connected to the inner wall of the sleeve (101) through the connecting plate (103). The connecting plate (103) has a first abutment. The first abutting surface (8211) is opposite to the third abutting surface (8213), and the second abutting surface (8212) is opposite to the fourth abutting surface (8214). A first injection space is formed between the first abutting surface (8211) and the third abutting surface (8213), and a second injection space is formed between the second abutting surface (8212) and the fourth abutting surface (8214). The sleeve (101) is sleeved on the outside of the tubular structure (821). The sleeve (101) is provided with a first injection port, a second injection port and a pressure relief port. The first injection port is connected to the first injection space, and the second injection port is connected to the second injection space. When using manual mode, the pressure relief port is connected to the second injection space.

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